National Geographic : 1933 Aug
NATURE'S INGENIOUS SPINNERS Approximately tnree times natural size BEWARE THE BLACK WIDOW, MOST VENOMOUS SPIDER IN THE UNITED STATES Beautiful but dangerous, Latrodectus mactans should be shunned. The adult female (left) measures almost a half inch in length, twice as large as her mate (below). The daughter (right) until mature resembles the father. Rather common in the South, the species is rare in the North. NOT DADDY LONGLEGS, BUT SPIDERS Around back doors or in basements in the warmer countries, pairs of Pholcusphalangioides build their irregular webs. The female (right) carries her egg mass in her jaws and feeds little till the young are hatched. The mate, unlike males of other species, can take care of himself.